1213012210321 has 4 divisors (see below), whose sum is σ = 1215750387312. Its totient is φ = 1210274033332.

The previous prime is 1213012210231. The next prime is 1213012210439. The reversal of 1213012210321 is 1230122103121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1213012210321 - 2¹¹ = 1213012208273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213012210621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1369087831 + ... + 1369088716.

It is an arithmetic number, because the mean of its divisors is an integer number (303937596828).

Almost surely, 2^{1213012210321} is an apocalyptic number.

It is an amenable number.

1213012210321 is a deficient number, since it is larger than the sum of its proper divisors (2738176991).

1213012210321 is an equidigital number, since it uses as much as digits as its factorization.

1213012210321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738176990.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1213012210321 its reverse (1230122103121), we get a palindrome (2443134313442).

The spelling of 1213012210321 in words is "one trillion, two hundred thirteen billion, twelve million, two hundred ten thousand, three hundred twenty-one".